Hey, so within Upfront you have the 'posts/pages/comments' option in the sidebar, to let you move from editing one page, to another. However, as the homepage seems to be magically created by the theme (is not an actual Page) - it is not listed in that list. So you can't switch back to the homepage from any other page or post. Which means you have to exit, then either return to Appearance>Customize or browse to Home and hit Upfront in the menu bar. Can be rather annoying.
Could there be a separate option to Edit Home in the sidebar? Or in the Pages/Posts/Comments lightbox as a hardcoded option or tab?
The same issue prevents you selecting Home as a page destination in the link UI, you are forced to use a URL.